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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 530 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.13² =
  2. 2.24² =
  3. 3.26² =
  4. 4.28² =
  5. 5.14² =
  6. 6.12² =
  7. 7.15² =
  8. 8.23² =
  9. 9.11² =
  10. 10.29² =
  11. 11.25² =
  12. 12.19² =
  13. 13.21² =
  14. 14.22² =
  15. 15.18² =
  16. 16.16² =
  17. 17.27² =
  18. 18.17² =
  19. 19.13² =
  20. 20.25² =
  21. 21.26² =
  22. 22.19² =
  23. 23.19² =
  24. 24.13² =
  25. 25.22² =
  26. 26.14² =
  27. 27.21² =
  28. 28.12² =
  29. 29.13² =
  30. 30.22² =
  31. 31.12² =
  32. 32.21² =
  33. 33.25² =
  34. 34.18² =
  35. 35.14² =
  36. 36.19² =
  37. 37.15² =
  38. 38.17² =
  39. 39.15² =
  40. 40.13² =

Answer key

  1. 169
  2. 576
  3. 676
  4. 784
  5. 196
  6. 144
  7. 225
  8. 529
  9. 121
  10. 841
  11. 625
  12. 361
  13. 441
  14. 484
  15. 324
  16. 256
  17. 729
  18. 289
  19. 169
  20. 625
  21. 676
  22. 361
  23. 361
  24. 169
  25. 484
  26. 196
  27. 441
  28. 144
  29. 169
  30. 484
  31. 144
  32. 441
  33. 625
  34. 324
  35. 196
  36. 361
  37. 225
  38. 289
  39. 225
  40. 169

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